A grey rubber stopper is a specially designed sealing component made of synthetic or natural rubber that fits snugly into the opening of a blood collection tube. It is commonly used in vacuum blood collection tubes, which are essential for collecting and storing blood samples for diagnostic testing.

The grey color of the stopper typically denotes a specific function in the context of blood collection. Rubber stoppers come in different colors, with each color serving a different purpose depending on the additives or chemicals inside the tube and the intended tests. Grey rubber stoppers are most commonly found on sodium fluoride and potassium oxalate tubes, which are used for glucose testing and blood sugar analysis. These chemicals in the tubes prevent the breakdown of glucose, ensuring the sample remains viable for accurate testing.

One of the primary reasons for using grey rubber stoppers in blood collection tubes is their role in maintaining the integrity of the blood sample. Blood samples must be securely sealed to prevent contamination, spillage, or exposure to external elements that could alter the chemical composition of the sample. The stopper acts as a barrier that ensures the contents of the tube remain intact until they are processed in the laboratory.

Moreover, the vacuum seal in the blood collection tube, aided by the grey rubber stopper, ensures that the correct amount of blood is collected, which is crucial for accurate test results. This vacuum effect also helps in preventing the clotting of blood and the breakdown of red blood cells during transport.

Blood collection tubes with grey rubber stoppers are designed to be airtight, ensuring that no outside contaminants or airborne particles can enter the tube. This is especially important in the medical field, where even the smallest contamination can compromise the accuracy of test results. The rubber material used in the stopper creates a hermetically sealed environment that minimizes the risk of exposure to bacteria, dust, or other environmental contaminants.

In addition to sealing the tube, the stopper also ensures that the chemical additives inside the tube, such as sodium fluoride, are securely contained and not compromised by external sources.

• Ultra-low metal dissolution, can be used for human blood metal detection
• Special surface treatment technology eliminates the effects of silicon treatments on blood products .
• The most stringent process control ensures the cleanliness of the rubber stopper .
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